Starlight Instruments SCT MicroFocuser Installation Instructions – Celestron 14” Telescopes [EN]

Installation Instructions – Celestron 14” Telescopes

Important:

removing the original focus assembly. If the telescope is not horizontal the primary
mirror could move during the installation. Also, the telescope should be positioned with
the dovetail on the bottom and the focuser on the right side (as viewed from behind)
during installation to prevent flexure from causing the focuser to bind when installed.

Required Tools: Phillips Screwdriver

The telescope optical tube must be positioned horizontally before

1/16” Hex-Head Wrench

Step 1

Separate Focuser Components

Begin by separating the 3 components of the SCT MicroFocuser. Remove the packing
foam from the inside of the focuser. This will allow the Adapter Ring to drop out of the
inside of the focuser. Remove the Knurled Sleeve from the main focuser. The Sleeve
protects the focus knob during shipping and covers the mounting screws when the
focuser is attached to the telescope.

Step 2

Telescopes with metal knobs are removed by loosening the small set screw in the side of
the knob using a 1/16” hex-head wrench. Rubber focus knobs can just be pulled off.
This will expose the brass focus shaft to which the MicroFocuser will be attached.

Remove Focus Knob

Step 3

Using a Phillips screwdriver, remove the three screws that hold the cover plate in place.
This will expose the inner workings of the focus assembly.

Remove Focus Assembly Cover Plate

Step 4

Slide the Ring Adapter over the brass focus shaft. The two pins should be pointing out
away from the telescope. Lock in place using a 1/16” hex-head wrench to tighten the
small set screw in the side. It will help in mounting the focuser to rotate the pins so they
are aligned side-by-side. (Looking at the back of the telescope, the left pin should be
aligned with the left mounting hole from where the original cover plate was removed.)

Attach Ring Adapter

Step 5

Hold the MicroFocuser with the “Feather Touch Focuser” logo on top. Look into the
inside of the focuser at the brass plate with the two holes in it. Rotate the black focus
knob until the holes are oriented side-by-side. (Looking into the focuser with the logo on
top, the right hole in the brass plate should line up with the right mounting hole in the
base of the focuser.)

Orient the Adapter Holes

Step 6

Slide the MicroFocuser over the Adapter Ring so the pins on the ring fit into the
matching holes in the focuser. It may help to rotate the black focus knob slightly to get
the pins into the holes. The three mounting holes in the base of the focuser should line up
with those on the telescope. Secure the focuser using the included 3 Phillips-head
screws.

Attach the MicroFocuser

Step 7

Thread the Knurled Sleeve onto the focuser in the opposite direction that it was removed.
When transporting the telescope, reverse the sleeve to its original position to protect the
focus knobs.

Attach the Knurled Sleeve